Seb35, 19/01/2013 17:15:
Thanks for your advices; I hope share the trip with some of you. I began a page to coordinate https://wikimania2013.wikimedia.org/wiki/Wikitrain
Regarding the prices of the train I found it is very (very) varying, from 150 € to 4300 €, and depends of many parameters like if it is a global ticket or tickets for local sections, if you buy it on the Web or in train stations, if you speak Russian, the period in the year, etc. so a deeper investigation is needed.
Also if you stop or not between the different sections, I heard?
Nemo